for-5.16/passthrough-flag-2021-10-29

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Merge tag 'for-5.16/passthrough-flag-2021-10-29' of git://git.kernel.dk/linux-block

Pull QUEUE_FLAG_SCSI_PASSTHROUGH removal from Jens Axboe:
 "This contains a series leading to the removal of the
  QUEUE_FLAG_SCSI_PASSTHROUGH queue flag"

* tag 'for-5.16/passthrough-flag-2021-10-29' of git://git.kernel.dk/linux-block:
  block: remove blk_{get,put}_request
  block: remove QUEUE_FLAG_SCSI_PASSTHROUGH
  block: remove the initialize_rq_fn blk_mq_ops method
  scsi: add a scsi_alloc_request helper
  bsg-lib: initialize the bsg_job in bsg_transport_sg_io_fn
  nfsd/blocklayout: use ->get_unique_id instead of sending SCSI commands
  sd: implement ->get_unique_id
  block: add a ->get_unique_id method

block/blk-core.c

@@ -597,34 +597,6 @@ bool blk_get_queue(struct request_queue *q)
 }
 EXPORT_SYMBOL(blk_get_queue);
 
-/**
- * blk_get_request - allocate a request
- * @q: request queue to allocate a request for
- * @op: operation (REQ_OP_*) and REQ_* flags, e.g. REQ_SYNC.
- * @flags: BLK_MQ_REQ_* flags, e.g. BLK_MQ_REQ_NOWAIT.
- */
-struct request *blk_get_request(struct request_queue *q, unsigned int op,
-				blk_mq_req_flags_t flags)
-{
-	struct request *req;
-
-	WARN_ON_ONCE(op & REQ_NOWAIT);
-	WARN_ON_ONCE(flags & ~(BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_PM));
-
-	req = blk_mq_alloc_request(q, op, flags);
-	if (!IS_ERR(req) && q->mq_ops->initialize_rq_fn)
-		q->mq_ops->initialize_rq_fn(req);
-
-	return req;
-}
-EXPORT_SYMBOL(blk_get_request);
-
-void blk_put_request(struct request *req)
-{
-	blk_mq_free_request(req);
-}
-EXPORT_SYMBOL(blk_put_request);
-
 static void handle_bad_sector(struct bio *bio, sector_t maxsector)
 {
 	char b[BDEVNAME_SIZE];

block/blk-mq-debugfs.c

@@ -124,7 +124,6 @@ static const char *const blk_queue_flag_name[] = {
 	QUEUE_FLAG_NAME(STATS),
 	QUEUE_FLAG_NAME(POLL_STATS),
 	QUEUE_FLAG_NAME(REGISTERED),
-	QUEUE_FLAG_NAME(SCSI_PASSTHROUGH),
 	QUEUE_FLAG_NAME(QUIESCED),
 	QUEUE_FLAG_NAME(PCI_P2PDMA),
 	QUEUE_FLAG_NAME(ZONE_RESETALL),

block/bsg-lib.c

@@ -31,6 +31,7 @@ static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 	struct bsg_job *job;
 	struct request *rq;
 	struct bio *bio;
+	void *reply;
 	int ret;
 
 	if (hdr->protocol != BSG_PROTOCOL_SCSI  ||
@@ -39,22 +40,28 @@ static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 	if (!capable(CAP_SYS_RAWIO))
 		return -EPERM;
 
-	rq = blk_get_request(q, hdr->dout_xfer_len ?
+	rq = blk_mq_alloc_request(q, hdr->dout_xfer_len ?
 			     REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 	rq->timeout = timeout;
 
 	job = blk_mq_rq_to_pdu(rq);
+	reply = job->reply;
+	memset(job, 0, sizeof(*job));
+	job->reply = reply;
+	job->reply_len = SCSI_SENSE_BUFFERSIZE;
+	job->dd_data = job + 1;
+
 	job->request_len = hdr->request_len;
 	job->request = memdup_user(uptr64(hdr->request), hdr->request_len);
 	if (IS_ERR(job->request)) {
 		ret = PTR_ERR(job->request);
-		goto out_put_request;
+		goto out_free_rq;
 	}
 
 	if (hdr->dout_xfer_len && hdr->din_xfer_len) {
-		job->bidi_rq = blk_get_request(rq->q, REQ_OP_DRV_IN, 0);
+		job->bidi_rq = blk_mq_alloc_request(rq->q, REQ_OP_DRV_IN, 0);
 		if (IS_ERR(job->bidi_rq)) {
 			ret = PTR_ERR(job->bidi_rq);
 			goto out_free_job_request;
@@ -134,11 +141,11 @@ out_unmap_bidi_rq:
 		blk_rq_unmap_user(job->bidi_bio);
 out_free_bidi_rq:
 	if (job->bidi_rq)
-		blk_put_request(job->bidi_rq);
+		blk_mq_free_request(job->bidi_rq);
 out_free_job_request:
 	kfree(job->request);
-out_put_request:
+out_free_rq:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return ret;
 }
 
@@ -302,18 +309,6 @@ static int bsg_init_rq(struct blk_mq_tag_set *set, struct request *req,
 	return 0;
 }
 
-/* called right before the request is given to the request_queue user */
-static void bsg_initialize_rq(struct request *req)
-{
-	struct bsg_job *job = blk_mq_rq_to_pdu(req);
-	void *reply = job->reply;
-
-	memset(job, 0, sizeof(*job));
-	job->reply = reply;
-	job->reply_len = SCSI_SENSE_BUFFERSIZE;
-	job->dd_data = job + 1;
-}
-
 static void bsg_exit_rq(struct blk_mq_tag_set *set, struct request *req,
 		       unsigned int hctx_idx)
 {
@@ -350,7 +345,6 @@ static const struct blk_mq_ops bsg_mq_ops = {
 	.queue_rq		= bsg_queue_rq,
 	.init_request		= bsg_init_rq,
 	.exit_request		= bsg_exit_rq,
-	.initialize_rq_fn	= bsg_initialize_rq,
 	.complete		= bsg_complete,
 	.timeout		= bsg_timeout,
 };

drivers/block/Kconfig

@@ -281,8 +281,8 @@ config BLK_DEV_RAM_SIZE
 config CDROM_PKTCDVD
 	tristate "Packet writing on CD/DVD media (DEPRECATED)"
 	depends on !UML
+	depends on SCSI
 	select CDROM
-	select SCSI_COMMON
 	help
 	  Note: This driver is deprecated and will be removed from the
 	  kernel in the near future!

drivers/block/paride/pd.c

@@ -775,14 +775,14 @@ static int pd_special_command(struct pd_unit *disk,
 	struct request *rq;
 	struct pd_req *req;
 
-	rq = blk_get_request(disk->gd->queue, REQ_OP_DRV_IN, 0);
+	rq = blk_mq_alloc_request(disk->gd->queue, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 	req = blk_mq_rq_to_pdu(rq);
 
 	req->func = func;
 	blk_execute_rq(disk->gd, rq, 0);
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return 0;
 }
 

drivers/block/pktcdvd.c

@@ -703,7 +703,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
 	struct request *rq;
 	int ret = 0;
 
-	rq = blk_get_request(q, (cgc->data_direction == CGC_DATA_WRITE) ?
+	rq = scsi_alloc_request(q, (cgc->data_direction == CGC_DATA_WRITE) ?
 			     REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
@@ -726,7 +726,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
 	if (scsi_req(rq)->result)
 		ret = -EIO;
 out:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return ret;
 }
 
@@ -2536,6 +2536,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	int i;
 	char b[BDEVNAME_SIZE];
 	struct block_device *bdev;
+	struct scsi_device *sdev;
 
 	if (pd->pkt_dev == dev) {
 		pkt_err(pd, "recursive setup not allowed\n");
@@ -2559,10 +2560,12 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_NDELAY, NULL);
 	if (IS_ERR(bdev))
 		return PTR_ERR(bdev);
-	if (!blk_queue_scsi_passthrough(bdev_get_queue(bdev))) {
+	sdev = scsi_device_from_queue(bdev->bd_disk->queue);
+	if (!sdev) {
 		blkdev_put(bdev, FMODE_READ | FMODE_NDELAY);
 		return -EINVAL;
 	}
+	put_device(&sdev->sdev_gendev);
 
 	/* This is safe, since we have a reference from open(). */
 	__module_get(THIS_MODULE);

drivers/block/virtio_blk.c

@@ -312,7 +312,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
 	struct request *req;
 	int err;
 
-	req = blk_get_request(q, REQ_OP_DRV_IN, 0);
+	req = blk_mq_alloc_request(q, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req))
 		return PTR_ERR(req);
 
@@ -323,7 +323,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
 	blk_execute_rq(vblk->disk, req, false);
 	err = blk_status_to_errno(virtblk_result(blk_mq_rq_to_pdu(req)));
 out:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 	return err;
 }
 

drivers/md/dm-mpath.c

@@ -530,7 +530,7 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
 
 	bdev = pgpath->path.dev->bdev;
 	q = bdev_get_queue(bdev);
-	clone = blk_get_request(q, rq->cmd_flags | REQ_NOMERGE,
+	clone = blk_mq_alloc_request(q, rq->cmd_flags | REQ_NOMERGE,
 			BLK_MQ_REQ_NOWAIT);
 	if (IS_ERR(clone)) {
 		/* EBUSY, ENODEV or EWOULDBLOCK: requeue */
@@ -579,7 +579,7 @@ static void multipath_release_clone(struct request *clone,
 						    clone->io_start_time_ns);
 	}
 
-	blk_put_request(clone);
+	blk_mq_free_request(clone);
 }
 
 /*

drivers/mmc/core/block.c

@@ -258,7 +258,7 @@ static ssize_t power_ro_lock_store(struct device *dev,
 	mq = &md->queue;
 
 	/* Dispatch locking to the block layer */
-	req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0);
+	req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_OUT, 0);
 	if (IS_ERR(req)) {
 		count = PTR_ERR(req);
 		goto out_put;
@@ -266,7 +266,7 @@ static ssize_t power_ro_lock_store(struct device *dev,
 	req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
 	blk_execute_rq(NULL, req, 0);
 	ret = req_to_mmc_queue_req(req)->drv_op_result;
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 	if (!ret) {
 		pr_info("%s: Locking boot partition ro until next power on\n",
@@ -646,7 +646,7 @@ static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
 	 * Dispatch the ioctl() into the block request queue.
 	 */
 	mq = &md->queue;
-	req = blk_get_request(mq->queue,
+	req = blk_mq_alloc_request(mq->queue,
 		idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
@@ -660,7 +660,7 @@ static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
 	blk_execute_rq(NULL, req, 0);
 	ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
 	err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 cmd_done:
 	kfree(idata->buf);
@@ -716,7 +716,7 @@ static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
 	 * Dispatch the ioctl()s into the block request queue.
 	 */
 	mq = &md->queue;
-	req = blk_get_request(mq->queue,
+	req = blk_mq_alloc_request(mq->queue,
 		idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
@@ -733,7 +733,7 @@ static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
 	for (i = 0; i < num_of_cmds && !err; i++)
 		err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
 
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 cmd_err:
 	for (i = 0; i < num_of_cmds; i++) {
@@ -2730,7 +2730,7 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
 	int ret;
 
 	/* Ask the block layer about the card status */
-	req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
+	req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req))
 		return PTR_ERR(req);
 	req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
@@ -2740,7 +2740,7 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
 		*val = ret;
 		ret = 0;
 	}
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 	return ret;
 }
@@ -2766,7 +2766,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
 		return -ENOMEM;
 
 	/* Ask the block layer for the EXT CSD */
-	req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
+	req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
 		goto out_free;
@@ -2775,7 +2775,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
 	req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
 	blk_execute_rq(NULL, req, 0);
 	err = req_to_mmc_queue_req(req)->drv_op_result;
-	blk_put_request(req);
+	blk_mq_free_request(req);
 	if (err) {
 		pr_err("FAILED %d\n", err);
 		goto out_free;

drivers/scsi/scsi_bsg.c

@@ -25,8 +25,8 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 		return -EOPNOTSUPP;
 	}
 
-	rq = blk_get_request(q, hdr->dout_xfer_len ?
+	rq = scsi_alloc_request(q, hdr->dout_xfer_len ?
-			     REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+				REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 	rq->timeout = timeout;
@@ -95,7 +95,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 out_free_cmd:
 	scsi_req_free_cmd(scsi_req(rq));
 out_put_request:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return ret;
 }
 

drivers/scsi/scsi_error.c

@@ -1979,7 +1979,7 @@ maybe_retry:
 
 static void eh_lock_door_done(struct request *req, blk_status_t status)
 {
-	blk_put_request(req);
+	blk_mq_free_request(req);
 }
 
 /**
@@ -1998,7 +1998,7 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
 	struct request *req;
 	struct scsi_request *rq;
 
-	req = blk_get_request(sdev->request_queue, REQ_OP_DRV_IN, 0);
+	req = scsi_alloc_request(sdev->request_queue, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req))
 		return;
 	rq = scsi_req(req);

drivers/scsi/scsi_ioctl.c

@@ -438,7 +438,7 @@ static int sg_io(struct scsi_device *sdev, struct gendisk *disk,
 		at_head = 1;
 
 	ret = -ENOMEM;
-	rq = blk_get_request(sdev->request_queue, writing ?
+	rq = scsi_alloc_request(sdev->request_queue, writing ?
 			     REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
@@ -490,7 +490,7 @@ static int sg_io(struct scsi_device *sdev, struct gendisk *disk,
 out_free_cdb:
 	scsi_req_free_cmd(req);
 out_put_request:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return ret;
 }
 
@@ -561,7 +561,7 @@ static int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk,
 
 	}
 
-	rq = blk_get_request(q, in_len ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+	rq = scsi_alloc_request(q, in_len ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto error_free_buffer;
@@ -634,7 +634,7 @@ static int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk,
 	}
 
 error:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 
 error_free_buffer:
 	kfree(buffer);

drivers/scsi/scsi_lib.c

@@ -216,7 +216,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 	struct scsi_request *rq;
 	int ret;
 
-	req = blk_get_request(sdev->request_queue,
+	req = scsi_alloc_request(sdev->request_queue,
 			data_direction == DMA_TO_DEVICE ?
 			REQ_OP_DRV_OUT : REQ_OP_DRV_IN,
 			rq_flags & RQF_PM ? BLK_MQ_REQ_PM : 0);
@@ -260,7 +260,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 		scsi_normalize_sense(rq->sense, rq->sense_len, sshdr);
 	ret = rq->result;
  out:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 	return ret;
 }
@@ -1079,9 +1079,6 @@ EXPORT_SYMBOL(scsi_alloc_sgtables);
  * This function initializes the members of struct scsi_cmnd that must be
  * initialized before request processing starts and that won't be
  * reinitialized if a SCSI command is requeued.
- *
- * Called from inside blk_get_request() for pass-through requests and from
- * inside scsi_init_command() for filesystem requests.
  */
 static void scsi_initialize_rq(struct request *rq)
 {
@@ -1098,6 +1095,18 @@ static void scsi_initialize_rq(struct request *rq)
 	cmd->retries = 0;
 }
 
+struct request *scsi_alloc_request(struct request_queue *q,
+		unsigned int op, blk_mq_req_flags_t flags)
+{
+	struct request *rq;
+
+	rq = blk_mq_alloc_request(q, op, flags);
+	if (!IS_ERR(rq))
+		scsi_initialize_rq(rq);
+	return rq;
+}
+EXPORT_SYMBOL_GPL(scsi_alloc_request);
+
 /*
  * Only called when the request isn't completed by SCSI, and not freed by
  * SCSI
@@ -1864,7 +1873,6 @@ static const struct blk_mq_ops scsi_mq_ops_no_commit = {
 #endif
 	.init_request	= scsi_mq_init_request,
 	.exit_request	= scsi_mq_exit_request,
-	.initialize_rq_fn = scsi_initialize_rq,
 	.cleanup_rq	= scsi_cleanup_rq,
 	.busy		= scsi_mq_lld_busy,
 	.map_queues	= scsi_map_queues,
@@ -1894,7 +1902,6 @@ static const struct blk_mq_ops scsi_mq_ops = {
 #endif
 	.init_request	= scsi_mq_init_request,
 	.exit_request	= scsi_mq_exit_request,
-	.initialize_rq_fn = scsi_initialize_rq,
 	.cleanup_rq	= scsi_cleanup_rq,
 	.busy		= scsi_mq_lld_busy,
 	.map_queues	= scsi_map_queues,
@@ -1960,6 +1967,14 @@ struct scsi_device *scsi_device_from_queue(struct request_queue *q)
 
 	return sdev;
 }
+/*
+ * pktcdvd should have been integrated into the SCSI layers, but for historical
+ * reasons like the old IDE driver it isn't.  This export allows it to safely
+ * probe if a given device is a SCSI one and only attach to that.
+ */
+#ifdef CONFIG_CDROM_PKTCDVD_MODULE
+EXPORT_SYMBOL_GPL(scsi_device_from_queue);
+#endif
 
 /**
  * scsi_block_requests - Utility function used by low-level drivers to prevent

drivers/scsi/scsi_scan.c

@@ -280,7 +280,6 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget,
 	sdev->request_queue = q;
 	q->queuedata = sdev;
 	__scsi_init_queue(sdev->host, q);
-	blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
 	WARN_ON_ONCE(!blk_get_queue(q));
 
 	depth = sdev->host->cmd_per_lun ?: 1;

drivers/scsi/sd.c

@@ -1757,6 +1757,44 @@ static void sd_rescan(struct device *dev)
 	sd_revalidate_disk(sdkp->disk);
 }
 
+static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
+		enum blk_unique_id type)
+{
+	struct scsi_device *sdev = scsi_disk(disk)->device;
+	const struct scsi_vpd *vpd;
+	const unsigned char *d;
+	int ret = -ENXIO, len;
+
+	rcu_read_lock();
+	vpd = rcu_dereference(sdev->vpd_pg83);
+	if (!vpd)
+		goto out_unlock;
+
+	ret = -EINVAL;
+	for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) {
+		/* we only care about designators with LU association */
+		if (((d[1] >> 4) & 0x3) != 0x00)
+			continue;
+		if ((d[1] & 0xf) != type)
+			continue;
+
+		/*
+		 * Only exit early if a 16-byte descriptor was found.  Otherwise
+		 * keep looking as one with more entropy might still show up.
+		 */
+		len = d[3];
+		if (len != 8 && len != 12 && len != 16)
+			continue;
+		ret = len;
+		memcpy(id, d + 4, len);
+		if (len == 16)
+			break;
+	}
+out_unlock:
+	rcu_read_unlock();
+	return ret;
+}
+
 static char sd_pr_type(enum pr_type type)
 {
 	switch (type) {
@@ -1861,6 +1899,7 @@ static const struct block_device_operations sd_fops = {
 	.check_events		= sd_check_events,
 	.unlock_native_capacity	= sd_unlock_native_capacity,
 	.report_zones		= sd_zbc_report_zones,
+	.get_unique_id		= sd_get_unique_id,
 	.pr_ops			= &sd_pr_ops,
 };
 

drivers/scsi/sg.c

@@ -815,7 +815,7 @@ sg_common_write(Sg_fd * sfp, Sg_request * srp,
 	if (atomic_read(&sdp->detaching)) {
 		if (srp->bio) {
 			scsi_req_free_cmd(scsi_req(srp->rq));
-			blk_put_request(srp->rq);
+			blk_mq_free_request(srp->rq);
 			srp->rq = NULL;
 		}
 
@@ -1390,7 +1390,7 @@ sg_rq_end_io(struct request *rq, blk_status_t status)
 	 */
 	srp->rq = NULL;
 	scsi_req_free_cmd(scsi_req(rq));
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 
 	write_lock_irqsave(&sfp->rq_list_lock, iflags);
 	if (unlikely(srp->orphan)) {
@@ -1718,13 +1718,13 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
 	 *
 	 * With scsi-mq enabled, there are a fixed number of preallocated
 	 * requests equal in number to shost->can_queue.  If all of the
-	 * preallocated requests are already in use, then blk_get_request()
+	 * preallocated requests are already in use, then scsi_alloc_request()
 	 * will sleep until an active command completes, freeing up a request.
 	 * Although waiting in an asynchronous interface is less than ideal, we
 	 * do not want to use BLK_MQ_REQ_NOWAIT here because userspace might
 	 * not expect an EWOULDBLOCK from this condition.
 	 */
-	rq = blk_get_request(q, hp->dxfer_direction == SG_DXFER_TO_DEV ?
+	rq = scsi_alloc_request(q, hp->dxfer_direction == SG_DXFER_TO_DEV ?
 			REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq)) {
 		kfree(long_cmdp);
@@ -1830,7 +1830,7 @@ sg_finish_rem_req(Sg_request *srp)
 
 	if (srp->rq) {
 		scsi_req_free_cmd(scsi_req(srp->rq));
-		blk_put_request(srp->rq);
+		blk_mq_free_request(srp->rq);
 	}
 
 	if (srp->res_used)

drivers/scsi/sr.c

@@ -967,7 +967,7 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
 	struct bio *bio;
 	int ret;
 
-	rq = blk_get_request(disk->queue, REQ_OP_DRV_IN, 0);
+	rq = scsi_alloc_request(disk->queue, REQ_OP_DRV_IN, 0);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 	req = scsi_req(rq);
@@ -1003,7 +1003,7 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
 	if (blk_rq_unmap_user(bio))
 		ret = -EFAULT;
 out_put_request:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 	return ret;
 }
 

drivers/scsi/st.c

@@ -530,7 +530,7 @@ static void st_scsi_execute_end(struct request *req, blk_status_t status)
 		complete(SRpnt->waiting);
 
 	blk_rq_unmap_user(tmp);
-	blk_put_request(req);
+	blk_mq_free_request(req);
 }
 
 static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
@@ -543,7 +543,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
 	int err = 0;
 	struct scsi_tape *STp = SRpnt->stp;
 
-	req = blk_get_request(SRpnt->stp->device->request_queue,
+	req = scsi_alloc_request(SRpnt->stp->device->request_queue,
 			data_direction == DMA_TO_DEVICE ?
 			REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req))
@@ -557,7 +557,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
 		err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen,
 				      GFP_KERNEL);
 		if (err) {
-			blk_put_request(req);
+			blk_mq_free_request(req);
 			return err;
 		}
 	}

drivers/scsi/ufs/ufshcd.c

@@ -2920,7 +2920,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 	 * Even though we use wait_event() which sleeps indefinitely,
 	 * the maximum wait time is bounded by SCSI request timeout.
 	 */
-	req = blk_get_request(q, REQ_OP_DRV_OUT, 0);
+	req = blk_mq_alloc_request(q, REQ_OP_DRV_OUT, 0);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
 		goto out_unlock;
@@ -2947,7 +2947,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 				    (struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
 
 out:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 out_unlock:
 	up_read(&hba->clk_scaling_lock);
 	return err;
@@ -6512,9 +6512,9 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
 	int task_tag, err;
 
 	/*
-	 * blk_get_request() is used here only to get a free tag.
+	 * blk_mq_alloc_request() is used here only to get a free tag.
 	 */
-	req = blk_get_request(q, REQ_OP_DRV_OUT, 0);
+	req = blk_mq_alloc_request(q, REQ_OP_DRV_OUT, 0);
 	if (IS_ERR(req))
 		return PTR_ERR(req);
 
@@ -6570,7 +6570,7 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
 	ufshcd_release(hba);
-	blk_put_request(req);
+	blk_mq_free_request(req);
 
 	return err;
 }
@@ -6655,7 +6655,7 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 
 	down_read(&hba->clk_scaling_lock);
 
-	req = blk_get_request(q, REQ_OP_DRV_OUT, 0);
+	req = blk_mq_alloc_request(q, REQ_OP_DRV_OUT, 0);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
 		goto out_unlock;
@@ -6736,7 +6736,7 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 				    (struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
 
 out:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 out_unlock:
 	up_read(&hba->clk_scaling_lock);
 	return err;
@@ -7907,7 +7907,7 @@ static void ufshcd_request_sense_done(struct request *rq, blk_status_t error)
 	if (error != BLK_STS_OK)
 		pr_err("%s: REQUEST SENSE failed (%d)\n", __func__, error);
 	kfree(rq->end_io_data);
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 }
 
 static int
@@ -7927,7 +7927,7 @@ ufshcd_request_sense_async(struct ufs_hba *hba, struct scsi_device *sdev)
 	if (!buffer)
 		return -ENOMEM;
 
-	req = blk_get_request(sdev->request_queue, REQ_OP_DRV_IN,
+	req = blk_mq_alloc_request(sdev->request_queue, REQ_OP_DRV_IN,
 			      /*flags=*/BLK_MQ_REQ_PM);
 	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
@@ -7952,7 +7952,7 @@ ufshcd_request_sense_async(struct ufs_hba *hba, struct scsi_device *sdev)
 	return 0;
 
 out_put:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 out_free:
 	kfree(buffer);
 	return ret;

drivers/scsi/ufs/ufshpb.c

@@ -449,7 +449,7 @@ static struct ufshpb_req *ufshpb_get_req(struct ufshpb_lu *hpb,
 		return NULL;
 
 retry:
-	req = blk_get_request(hpb->sdev_ufs_lu->request_queue, dir,
+	req = blk_mq_alloc_request(hpb->sdev_ufs_lu->request_queue, dir,
 			      BLK_MQ_REQ_NOWAIT);
 
 	if (!atomic && (PTR_ERR(req) == -EWOULDBLOCK) && (--retries > 0)) {
@@ -473,7 +473,7 @@ free_rq:
 
 static void ufshpb_put_req(struct ufshpb_lu *hpb, struct ufshpb_req *rq)
 {
-	blk_put_request(rq->req);
+	blk_mq_free_request(rq->req);
 	kmem_cache_free(hpb->map_req_cache, rq);
 }
 

drivers/target/target_core_pscsi.c

@@ -980,11 +980,10 @@ pscsi_execute_cmd(struct se_cmd *cmd)
 	memcpy(pt->pscsi_cdb, cmd->t_task_cdb,
 		scsi_command_size(cmd->t_task_cdb));
 
-	req = blk_get_request(pdv->pdv_sd->request_queue,
+	req = scsi_alloc_request(pdv->pdv_sd->request_queue,
 			cmd->data_direction == DMA_TO_DEVICE ?
 			REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 	if (IS_ERR(req)) {
-		pr_err("PSCSI: blk_get_request() failed\n");
 		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		goto fail;
 	}
@@ -1012,7 +1011,7 @@ pscsi_execute_cmd(struct se_cmd *cmd)
 	return 0;
 
 fail_put_request:
-	blk_put_request(req);
+	blk_mq_free_request(req);
 fail:
 	kfree(pt);
 	return ret;
@@ -1067,7 +1066,7 @@ static void pscsi_req_done(struct request *req, blk_status_t status)
 		break;
 	}
 
-	blk_put_request(req);
+	blk_mq_free_request(req);
 	kfree(pt);
 }
 

fs/nfsd/Kconfig

@@ -109,7 +109,6 @@ config NFSD_SCSILAYOUT
 	depends on NFSD_V4 && BLOCK
 	select NFSD_PNFS
 	select EXPORTFS_BLOCK_OPS
-	select SCSI_COMMON
 	help
 	  This option enables support for the exporting pNFS SCSI layouts
 	  in the kernel's NFS server. The pNFS SCSI layout enables NFS

fs/nfsd/blocklayout.c

@@ -9,9 +9,6 @@
 #include <linux/pr.h>
 
 #include <linux/nfsd/debug.h>
-#include <scsi/scsi_proto.h>
-#include <scsi/scsi_common.h>
-#include <scsi/scsi_request.h>
 
 #include "blocklayoutxdr.h"
 #include "pnfs.h"
@@ -211,109 +208,6 @@ const struct nfsd4_layout_ops bl_layout_ops = {
 #endif /* CONFIG_NFSD_BLOCKLAYOUT */
 
 #ifdef CONFIG_NFSD_SCSILAYOUT
-static int nfsd4_scsi_identify_device(struct block_device *bdev,
-		struct pnfs_block_volume *b)
-{
-	struct request_queue *q = bdev->bd_disk->queue;
-	struct request *rq;
-	struct scsi_request *req;
-	/*
-	 * The allocation length (passed in bytes 3 and 4 of the INQUIRY
-	 * command descriptor block) specifies the number of bytes that have
-	 * been allocated for the data-in buffer.
-	 * 252 is the highest one-byte value that is a multiple of 4.
-	 * 65532 is the highest two-byte value that is a multiple of 4.
-	 */
-	size_t bufflen = 252, maxlen = 65532, len, id_len;
-	u8 *buf, *d, type, assoc;
-	int retries = 1, error;
-
-	if (WARN_ON_ONCE(!blk_queue_scsi_passthrough(q)))
-		return -EINVAL;
-
-again:
-	buf = kzalloc(bufflen, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	rq = blk_get_request(q, REQ_OP_DRV_IN, 0);
-	if (IS_ERR(rq)) {
-		error = -ENOMEM;
-		goto out_free_buf;
-	}
-	req = scsi_req(rq);
-
-	error = blk_rq_map_kern(q, rq, buf, bufflen, GFP_KERNEL);
-	if (error)
-		goto out_put_request;
-
-	req->cmd[0] = INQUIRY;
-	req->cmd[1] = 1;
-	req->cmd[2] = 0x83;
-	req->cmd[3] = bufflen >> 8;
-	req->cmd[4] = bufflen & 0xff;
-	req->cmd_len = COMMAND_SIZE(INQUIRY);
-
-	blk_execute_rq(NULL, rq, 1);
-	if (req->result) {
-		pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
-			req->result);
-		error = -EIO;
-		goto out_put_request;
-	}
-
-	len = (buf[2] << 8) + buf[3] + 4;
-	if (len > bufflen) {
-		if (len <= maxlen && retries--) {
-			blk_put_request(rq);
-			kfree(buf);
-			bufflen = len;
-			goto again;
-		}
-		pr_err("pNFS: INQUIRY 0x83 response invalid (len = %zd)\n",
-			len);
-		goto out_put_request;
-	}
-
-	d = buf + 4;
-	for (d = buf + 4; d < buf + len; d += id_len + 4) {
-		id_len = d[3];
-		type = d[1] & 0xf;
-		assoc = (d[1] >> 4) & 0x3;
-
-		/*
-		 * We only care about a EUI-64 and NAA designator types
-		 * with LU association.
-		 */
-		if (assoc != 0x00)
-			continue;
-		if (type != 0x02 && type != 0x03)
-			continue;
-		if (id_len != 8 && id_len != 12 && id_len != 16)
-			continue;
-
-		b->scsi.code_set = PS_CODE_SET_BINARY;
-		b->scsi.designator_type = type == 0x02 ?
-			PS_DESIGNATOR_EUI64 : PS_DESIGNATOR_NAA;
-		b->scsi.designator_len = id_len;
-		memcpy(b->scsi.designator, d + 4, id_len);
-
-		/*
-		 * If we found a 8 or 12 byte descriptor continue on to
-		 * see if a 16 byte one is available.  If we find a
-		 * 16 byte descriptor we're done.
-		 */
-		if (id_len == 16)
-			break;
-	}
-
-out_put_request:
-	blk_put_request(rq);
-out_free_buf:
-	kfree(buf);
-	return error;
-}
-
 #define NFSD_MDS_PR_KEY		0x0100000000000000ULL
 
 /*
@@ -325,6 +219,31 @@ static u64 nfsd4_scsi_pr_key(struct nfs4_client *clp)
 	return ((u64)clp->cl_clientid.cl_boot << 32) | clp->cl_clientid.cl_id;
 }
 
+static const u8 designator_types[] = {
+	PS_DESIGNATOR_EUI64,
+	PS_DESIGNATOR_NAA,
+};
+
+static int
+nfsd4_block_get_unique_id(struct gendisk *disk, struct pnfs_block_volume *b)
+{
+	int ret, i;
+
+	for (i = 0; i < ARRAY_SIZE(designator_types); i++) {
+		u8 type = designator_types[i];
+
+		ret = disk->fops->get_unique_id(disk, b->scsi.designator, type);
+		if (ret > 0) {
+			b->scsi.code_set = PS_CODE_SET_BINARY;
+			b->scsi.designator_type = type;
+			b->scsi.designator_len = ret;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
 static int
 nfsd4_block_get_device_info_scsi(struct super_block *sb,
 		struct nfs4_client *clp,
@@ -333,7 +252,7 @@ nfsd4_block_get_device_info_scsi(struct super_block *sb,
 	struct pnfs_block_deviceaddr *dev;
 	struct pnfs_block_volume *b;
 	const struct pr_ops *ops;
-	int error;
+	int ret;
 
 	dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) +
 		      sizeof(struct pnfs_block_volume), GFP_KERNEL);
@@ -347,33 +266,38 @@ nfsd4_block_get_device_info_scsi(struct super_block *sb,
 	b->type = PNFS_BLOCK_VOLUME_SCSI;
 	b->scsi.pr_key = nfsd4_scsi_pr_key(clp);
 
-	error = nfsd4_scsi_identify_device(sb->s_bdev, b);
+	ret = nfsd4_block_get_unique_id(sb->s_bdev->bd_disk, b);
-	if (error)
+	if (ret < 0)
-		return error;
+		goto out_free_dev;
 
+	ret = -EINVAL;
 	ops = sb->s_bdev->bd_disk->fops->pr_ops;
 	if (!ops) {
 		pr_err("pNFS: device %s does not support PRs.\n",
 			sb->s_id);
-		return -EINVAL;
+		goto out_free_dev;
 	}
 
-	error = ops->pr_register(sb->s_bdev, 0, NFSD_MDS_PR_KEY, true);
+	ret = ops->pr_register(sb->s_bdev, 0, NFSD_MDS_PR_KEY, true);
-	if (error) {
+	if (ret) {
 		pr_err("pNFS: failed to register key for device %s.\n",
 			sb->s_id);
-		return -EINVAL;
+		goto out_free_dev;
 	}
 
-	error = ops->pr_reserve(sb->s_bdev, NFSD_MDS_PR_KEY,
+	ret = ops->pr_reserve(sb->s_bdev, NFSD_MDS_PR_KEY,
 			PR_EXCLUSIVE_ACCESS_REG_ONLY, 0);
-	if (error) {
+	if (ret) {
 		pr_err("pNFS: failed to reserve device %s.\n",
 			sb->s_id);
-		return -EINVAL;
+		goto out_free_dev;
 	}
 
 	return 0;
+
+out_free_dev:
+	kfree(dev);
+	return ret;
 }
 
 static __be32

fs/nfsd/nfs4layouts.c

@@ -145,8 +145,9 @@ void nfsd4_setup_layout_type(struct svc_export *exp)
 #ifdef CONFIG_NFSD_SCSILAYOUT
 	if (sb->s_export_op->map_blocks &&
 	    sb->s_export_op->commit_blocks &&
-	    sb->s_bdev && sb->s_bdev->bd_disk->fops->pr_ops &&
+	    sb->s_bdev &&
-		blk_queue_scsi_passthrough(sb->s_bdev->bd_disk->queue))
+	    sb->s_bdev->bd_disk->fops->pr_ops &&
+	    sb->s_bdev->bd_disk->fops->get_unique_id)
 		exp->ex_layout_types |= 1 << LAYOUT_SCSI;
 #endif
 }

include/linux/blk-mq.h

@@ -566,11 +566,6 @@ struct blk_mq_ops {
 	void (*exit_request)(struct blk_mq_tag_set *set, struct request *,
 			     unsigned int);
 
-	/**
-	 * @initialize_rq_fn: Called from inside blk_get_request().
-	 */
-	void (*initialize_rq_fn)(struct request *rq);
-
 	/**
 	 * @cleanup_rq: Called before freeing one request which isn't completed
 	 * yet, and usually for freeing the driver private data.
@@ -897,9 +892,6 @@ static inline bool rq_is_sync(struct request *rq)
 }
 
 void blk_rq_init(struct request_queue *q, struct request *rq);
-void blk_put_request(struct request *rq);
-struct request *blk_get_request(struct request_queue *q, unsigned int op,
-		blk_mq_req_flags_t flags);
 int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
 		struct bio_set *bs, gfp_t gfp_mask,
 		int (*bio_ctr)(struct bio *, struct bio *, void *), void *data);

include/linux/blkdev.h

@@ -399,7 +399,6 @@ struct request_queue {
 #define QUEUE_FLAG_STATS	20	/* track IO start and completion times */
 #define QUEUE_FLAG_POLL_STATS	21	/* collecting stats for hybrid polling */
 #define QUEUE_FLAG_REGISTERED	22	/* queue has been registered to a disk */
-#define QUEUE_FLAG_SCSI_PASSTHROUGH 23	/* queue supports SCSI commands */
 #define QUEUE_FLAG_QUIESCED	24	/* queue has been quiesced */
 #define QUEUE_FLAG_PCI_P2PDMA	25	/* device supports PCI p2p requests */
 #define QUEUE_FLAG_ZONE_RESETALL 26	/* supports Zone Reset All */
@@ -433,8 +432,6 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
 #define blk_queue_secure_erase(q) \
 	(test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags))
 #define blk_queue_dax(q)	test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)
-#define blk_queue_scsi_passthrough(q)	\
-	test_bit(QUEUE_FLAG_SCSI_PASSTHROUGH, &(q)->queue_flags)
 #define blk_queue_pci_p2pdma(q)	\
 	test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags)
 #ifdef CONFIG_BLK_RQ_ALLOC_TIME
@@ -1188,6 +1185,14 @@ static inline void blk_crypto_unregister(struct request_queue *q) { }
 
 #endif /* CONFIG_BLK_INLINE_ENCRYPTION */
 
+enum blk_unique_id {
+	/* these match the Designator Types specified in SPC */
+	BLK_UID_T10	= 1,
+	BLK_UID_EUI64	= 2,
+	BLK_UID_NAA	= 3,
+};
+
+#define NFL4_UFLG_MASK			0x0000003F
 
 struct block_device_operations {
 	void (*submit_bio)(struct bio *bio);
@@ -1206,6 +1211,9 @@ struct block_device_operations {
 	int (*report_zones)(struct gendisk *, sector_t sector,
 			unsigned int nr_zones, report_zones_cb cb, void *data);
 	char *(*devnode)(struct gendisk *disk, umode_t *mode);
+	/* returns the length of the identifier or a negative errno: */
+	int (*get_unique_id)(struct gendisk *disk, u8 id[16],
+			enum blk_unique_id id_type);
 	struct module *owner;
 	const struct pr_ops *pr_ops;
 

include/scsi/scsi_cmnd.h

@@ -396,4 +396,7 @@ static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
 extern void scsi_build_sense(struct scsi_cmnd *scmd, int desc,
 			     u8 key, u8 asc, u8 ascq);
 
+struct request *scsi_alloc_request(struct request_queue *q,
+		unsigned int op, blk_mq_req_flags_t flags);
+
 #endif /* _SCSI_SCSI_CMND_H */